ML17195A179
| ML17195A179 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/26/1984 |
| From: | Johnson G Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17195A178 | List: |
| References | |
| NUDOCS 8404300157 | |
| Download: ML17195A179 (10) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION REQUESTS FOR RELIEF FROM INSERVItE INSPECTION REOUIREMENTS COMMONWEALTH EDISON INTRODUCTION DRESDEN STATION UNITS 2 & 3 DOCKET NOS. 50-237/249 Technical Specification 4. 6 *for the* Dresden Station Units. 2 and. 3' states that inservice examination of ASMECode Class 1, 2, and 3 components*
shall be performed in accordance. with Section XI of the ASME Boiler and Pressure Vessel Code and applicable Addenda as required by 10 CFR 50.SSa(g) except where spectfic written relief has been granted b~ the Commission~
Certain requirements of later editions and addenda of Section XI are impractical to perform on older plants because of the plants' design, component geometry, and materials of construction.
Thus, 10 CFR 50.55a (g)(6)( i) authorizes the Cammi ssi on to grant re 1 i ef from those require-ments upon making the necessary findings.
By* letter dated December 10, 1982, Commonwealth Edison submitted its inservice inspection program revisions, ana additional information related to request for re~ief from certain Code requirements deter-mined to be impractical to perfo:'"fl1 on the Dresden Station Units 2 & 3 during the inspection interval.
The program is based on the 1977 Edition through Summer of 1979 Addenda of Section XI of the ASME Code, and covers the 120-month inservice inspection period from March 1, 1982 to March l, 1992.
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EVALUATION Requests for relief from the requirements of Section XI which have been determined to be impractical to perform have been reviewed by the staff's contractor, Battelle, Pacific Northwest Laboratory.
The contractor's evaluations of the licensee's requests for relief and his recommendations are presented in the Technical Evaluation Report (TER) attached.
The staff ha& reviewed the TER and agrees with the* evaluations and recommendations.
A summary of the determinations made by the sta.ff is presented in the following tables:
2
TABLE 1 CLASS 1 COMPONENTS Licensee Proposed Relief IWB-2600 IWB-2500 System or Area to be Required Alternative Request Item No.
Exam. Cat.
Component Examined Method Exam Status 81.11 B-A Reactor Longitudinal Volumetric None Granted 81.12 Vessel
& ci rcumfer"".'
ential welds in the core beltline region 83.100 B-D Reactor SBLC nozzle Volumetric None Granted Vessel inner radius 89.11 B-J Piping Welds inac-*
Volumetric Volumetric Granted cessible due.
exam of the to penetra-outer out-tions:
of-contain-(CRD-0308-4 11 ment welds (Shutdown cooling-lOOlA-16 11 10018-16 11 (RX Water Cleanup-1201-8 11
(!so Condens-1302-14 11 1303-12 11 (Core Spray-1403-10 11 1004-10 11 (EPCI-2305-10 11 (LPCI-1506-16 11
-1519-16 11 (Main Steam-3001A,B,C,D-20 11 (Feedwater;...
3204A,B-18 11 89.30 B-J Piping Branch con-
- Volumetric/ Visual dur-Relief nections Surf ace ing hydro-granted covered by static from saddle re-volume-inforcement
- tric, but not surface DRESDEN INSERVICE INSPECTION
e I. I' TABLE 1 (cont,)
'i' CLASS 1 COMPONENTS i
Licensee*
Proposed Relief IWB-2600 IWB-2500 System or Area.to be Required Alternative Request Item No.
Exam. Cat.
ComEonent Examined Method Exam Status 812.40 B-M-2 Valves Valve inter-Visual Visual exam.* G~anted nal during maintenance *. *
- i.
4 DRESDEN INSERVICE INSPECTION
IWB-2600 IWB-2520 System or Item No.
Exam. Cat.
Component Cl.30 C-A Vessel cs.20-C-F Piping 5.30*
TABLE 2 CLASS 2 COMPONENTS Area to be Required Examined Method Tube sheet-Volumetric to-shell weld on LPCI/CCSW heat ex- 0 changer Branch con-Volumetric/
nection Surf ace cove.red by reinforce-ment Licensee Proposed Relief Alternative Request Exam Status Monthly sur-Granted veil lance and visual during hydrostatic test Visual dur-Relief ing hydro-granted stat.le.
from vol-umetrfc exam but not~ sur-face exam 5
DRESDEN INSERVICE INSPECTION
TABLE 3.
CLASS 3 COMPONENTS No Relief Requests 6
- DRESDEN INSERVICE INSP=CTION
System or Component TABLE 4 PRESSURE TEST IWA-5000, IWB-5000 IWC-5000 and IW0-5000 Test Pressure Requirement Licensee Proposed Alternative Test Pressure No Relief Requests Relief Request Status 7
DRESDEN INSERVICE INSPECTION
TABLE 5 ULTRASONIC EXAMINATION TECHNIQUE System or Component Requirement Calibration III-3400,3410 Blocks - docu-mentation Licensee Proposed Alternative Method All future cal~ blocks will conform to Code requirements Relief Request Status
- ( Based on a successful demonstration in response to IEB-82-03 and/or 83-02, no change need be made on austenitic calibrat.ion blocks.
( For ferritic ca.libration blocks, attenuation and ve.locity comparisons.
should be* made between* pipe and* ca 1 i brat.ion s.tandards to ensure adequate*
ultrasonic sensitivi'ty.
8 DRESDEN INSERVICE INSPECTION
System or Component TABLE 6 GENERAL RELIEF REQUEISTS ALL CLASSES/COMPONENTS Requirement Licensee Proposed Alternative Method No Relief Requests Relief Request Status 9
DRESDEN INSERVICE INSPECTION
CONCLUSION Based on the review summarized, the staff concludes that relief granted from the examination requirements and alternate methods imposed through this document give reasonable assurance of the piping and component pressure boundary and support structure integrity; that granting relief where the Code requirements are impractical is authorized by law and will not endanger life or property, or the common defense and-security, and is otherwise in the public interest considering the burden that could result if they were imposed on the facility.
ACKNO\\.ILEDGP1ENT This evaluation was prepared by G. Johnson.
0 lO DRESDEN INSERVICE INSPECTION